VALUING DAIRY STOCK 247 



tions, the values here obtained are intended to be used 

 as general averages only. 



In fixing the value of the manure from cows of different 

 productive capacities, $15 is allowed as the value of the 

 manure from the feed required for maintenance and for 

 the development of the foetus. In this connection it 

 should be remembered that the one and one-half acres of 

 land allotted per cow are intended to supply all of the 

 roughage needed, and this should contain nutrients suffi- 

 cient for maintenance requirements. On one-half of this 

 land there is grown, say, one ton of red clover hay and 

 three tons of corn silage, which contain fertilizing ingre- 

 dients to the value of $13.62. If one-half of this amount 

 is allowed as the value of the fertilizing ingredients con- 

 tained in the pasture from the other half of the land, the 

 total value of the fertilizing constituents contained in the 

 feed required for maintenance is $20.00. Some of the fer- 

 tilizing constituents enter into the foetus, but it is safe 

 to say that three- fourths of them, or $15 worth, pass into 

 the manure. This maintenance feed, and its value as a 

 fertilizer, is quite constant for cows of different pro- 

 ductive capacities. Additional manurial value is, therefore, 

 obtained from the amount of concentrated feeds supplied 

 for milk production. According to European and Ameri- 

 can figures, this amount is approximately 800 pounds for 

 each 2,500 pounds of 4% milk, or for each 100 pounds of 

 butter fat, produced. 



The manurial value of each pound of the common con- 

 centrates varies from three-eighths cent for corn to about 

 one and one-fourth cents for cottonseed meal and linseed 

 meal, with intervening values of three-fourths cent for 

 wheat bran, dried brewers grains and gluten feed, and 



